[Dynamics of selenium in the blood of cows during the year and in pregnancy].
D000818:Animals; D002417:Cattle / Q000097:blood*; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal; D012621:Seasons; D012643:Selenium / Q000097:blood*
D012643:Selenium
Dynamika selénu v krvnom sére kráv v priebehu roka a pocas gravidity.